There is one and only one thing that will 'get you saved'. Romans 10:9 If you declare with your mouth, "Jesus is Lord," and believe in your heart that God raised him from the dead, you will be saved. That's it. There is no amount of works that will get you in, there is no amount of works that will kick you out. That's not to say there are no consequences to backsliding, but salvation does not hinge on them. As long as you honestly meet the requirements of Romans 10:9, you are saved.
As long as. The one, the only way 'in' is thru confession and belief ... the one and only way to change that is denial and disbelief. And the Bible says it will happen, so I have to believe it is possible. So yes, just as you must believe and confess Him to be saved, you must reject faith and deny Him to inherit this creation in it's natural state apart from Him.
That's what the lake of fire is, you know.